I hate it when people take politics and the bible on the same level, because it is mixing the word of man with the word of God.
I [provisionally] agree — the bible itself says that the law cannot save, it's a heart issue. (Rom 7,8; Hebrews, James)
However, 1 Cor 6:3 clearly rebukes early Christians for deficiency in the realm of governance: Do you not know that we will judge angels? How much more the things of this life!
However, there's a certain mode of thought which says something like if you're in a position of [governmental] authority, you cannot have your faith inform you of [moral] actions without violating the "separation of church and state"
, but what this mode of thought doesn't take into account is that a faith which is not acted on is no faith at all. (i.e. it is an assertion that a Christian in an authority position cannot practice his religion.)